Intl.RelativeTimeFormat.prototype.resolvedOptions()

Baseline Widely available

This feature is well established and works across many devices and browser versions. It’s been available across browsers since September 2020.

The resolvedOptions() method of Intl.RelativeTimeFormat instances returns a new object with properties reflecting the options computed during initialization of this RelativeTimeFormat object.

Try it

Syntax

js
resolvedOptions()

Parameters

None.

Return value

A new object with properties reflecting the options computed during the initialization of this RelativeTimeFormat object. The object has the following properties, in the order they are listed:

locale

The BCP 47 language tag for the locale actually used, determined by the locale negotiation process. Only the nu Unicode extension key, if requested, may be included in the output.

style

The value provided for this property in the options argument, with default filled in as needed. It is either "long", "short", or "narrow". The default is "long".

numeric

The value provided for this property in the options argument, with default filled in as needed. It is either "always" or "auto". The default is "always".

numberingSystem

The value provided for this property in the options argument, or using the Unicode extension key "nu", with default filled in as needed. It is a supported numbering system for this locale. The default is locale dependent.

Examples

Using the resolvedOptions() method

js
const de = new Intl.RelativeTimeFormat("de-DE");
const usedOptions = de.resolvedOptions();

usedOptions.locale; // "de-DE"
usedOptions.style; // "long"
usedOptions.numeric; // "always"
usedOptions.numberingSystem; // "latn"

Specifications

Specification
ECMAScript® 2025 Internationalization API Specification
# sec-intl.relativetimeformat.prototype.resolvedoptions

Browser compatibility

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See also